Question 4 Points: ( 78) Write a recursive function fibonacci in MATLAB that calculates the nth Fibonacci number where the user can specify the two starting numbers eg.: Starting Number 1: 4 Starting Number 2:6 N: 5 1st 2nd 3rd 4th 5th 4 6 (4+6) =10 (6+10) =16 (10+16) = 26 Your function should behave as follows: >> fibonacci (4, 6, 5) ans = 26 Question 5: Points: 16) Plot the surface of ** xy Z= 23 where x ranges from 0 to 10 in steps of 0.5, and y ranges from 3 to 5 in steps of 0.1. Points: 18) Question 6 The following code is given: function (A] - mystery function(n) Azeros(n); 1=1; 3:1; k=1; lon; for i=1:n for $110 14 ) for kj1 A(1,k) ui; Ak, 1)-1; end end end 1-1-1; eng end a) What would be the output of the following statement? >> Mystery_Matrix = mystery_function (4) b) Write the MATLAB statements to: save the element of the 3rd row and 4th column in Mystery_Matrix in the variable Mystery_Element. What value is now stored in Mystery Element? save Mystery Element in an ASCII file called mystery_file.txt. Question 7: Points: 110) The following script is supposed to continually ask the user for a numerical input until the number 'O' is entered. Afterwards, the script displays the sum of all the numbers, the max and min numbers, the product of all the numbers, and the mean of all the numbers. Mark and correct all the mistakes you find (syntax and logical errors which would crash the program or result in wrong output) clear all; close all; clc; number=1; starting condition sum=0; variable to calculate the sum of all mitbers prod=0; varlable to calculate the product flag=1; flag to determine the first run of the while loop counter=0; 1 counter to count the entered numbers for number-=0 number=input('Please enter a number: ',''); sum=sum+number; if flag=1 run only if it is the first time max_number=number; set max to number min_number=number; set min to number flag=0; reset Elag to zero end if number==0 only execute if a non zero number was entered prod=prod*number; * calculate product if numbermin_number check if new number is smaller min_number=number; variable to store the minimum number end counter=counter+1; end end printf ("The sum of all numbers entered is $g. ' sum); printf('The maximum number was: fe. ', max_number); printf('The minimum number was: fi.n', min_number); printf ("The product of all numbers is: &c. ', prod); printf("The mean of all numbers is: %.2f. ', sum/counter); Good hoki